I have a collection of chips with covered wagons on them and 2 of them are from the Last Frontier, Las Vegas, a 5 and a 100.I see these chips often and prices are all over the board. Why? What is a fair price to pay for each one? I totally forget what I paid for my 2. They're some of the 1st ones I ever got. Do the numbers on the chips refer to dollars? Are there any other denominations with the covered wagon? Nancy Olson R-5436